Action-2044: Conflict resolution with none/presentational roles

Overall, I agree the whole presentation section should be rewritten for simplification although I am reluctant to do that for ARIA 1.1 given our time constraints and the complexity of the issues involved. We need to lock down ARIA 1.1 in June. 

https://rawgit.com/w3c/aria/action2044/aria/aria.html#conflict_resolution_presentation_none <https://rawgit.com/w3c/aria/action2044/aria/aria.html#conflict_resolution_presentation_none>

I believe the changes address SVG. If need be I could give an example of <circle role=“graphics-object”><title>hole in the ground</tltle></circle> to illustrate the implicit native host language semantics situation. 

As for the rest of the presentation role definition, it is understood that ARIA 1.1 allows for implicit native host language semantics having an aria role to be treated the same way.

Rich